Get in touch
Email levin@fourandthree.com for product questions, bug reports, or privacy requests. Nightingale is an app by Four & Three. Include your device model, operating-system version, app version, and a short description of what happened. Please use fictional examples and redact personal or financial information in screenshots. Never send your device passcode, Apple Account password, or vault recovery secret.
Testing Nightingale
The app is currently in development. If you have a TestFlight invitation, install the current build through Apple’s TestFlight app and submit feedback there or by email. Beta builds may expire and features can change. Keep separate copies of important records. A public download link will appear here when available.
Your records and recovery
We cannot read or recover your encrypted vault for you. Use the app’s export, recovery, and erasure controls and keep your encrypted recovery bundle and separate recovery secret safe. Disabling sync or removing the app does not necessarily erase iCloud copies or backups. If erasure is interrupted, follow the app’s instructions to resume it.
Privacy and legal information
Read our Privacy Policy for local AI, iCloud, website, and TestFlight processing; our Terms of Service; the AI Acceptable Use Policy; and the AI Risk Disclosure.